21365865

素因数分解:

$3^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{967}}^1$

素因数の和:1469

約数の個数: 24

約数和(自身を含む): 37147968

約数和(自身を除く): 15782103

約数列:

[1, 3, 5, 9, 15, 45, 491, 967, 1473, 2455, 2901, 4419, 4835, 7365, 8703, 14505, 22095, 43515, 474797, 1424391, 2373985, 4273173, 7121955, 21365865]

約数ペア:

[(1, 21365865), (3, 7121955), (5, 4273173), (9, 2373985), (15, 1424391), (45, 474797), (491, 43515), (967, 22095), (1473, 14505), (2455, 8703), (2901, 7365), (4419, 4835)]